Expand PMF_FN_* macros.
[netbsd-mini2440.git] / dist / wpa / hostapd / wme.c
blobae2357e5ad511e55eda697c024ebab4fc212d63b
1 /*
2 * hostapd / WMM (Wi-Fi Multimedia)
3 * Copyright 2002-2003, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Alternatively, this software may be distributed under the terms of BSD
11 * license.
13 * See README and COPYING for more details.
16 #include "includes.h"
18 #include "hostapd.h"
19 #include "ieee802_11.h"
20 #include "wme.h"
21 #include "sta_info.h"
22 #include "driver.h"
25 /* TODO: maintain separate sequence and fragment numbers for each AC
26 * TODO: IGMP snooping to track which multicasts to forward - and use QOS-DATA
27 * if only WME stations are receiving a certain group */
30 static u8 wme_oui[3] = { 0x00, 0x50, 0xf2 };
33 /* Add WME Parameter Element to Beacon and Probe Response frames. */
34 u8 * hostapd_eid_wme(struct hostapd_data *hapd, u8 *eid)
36 u8 *pos = eid;
37 struct wme_parameter_element *wme =
38 (struct wme_parameter_element *) (pos + 2);
39 int e;
41 if (!hapd->conf->wme_enabled)
42 return eid;
43 eid[0] = WLAN_EID_VENDOR_SPECIFIC;
44 wme->oui[0] = 0x00;
45 wme->oui[1] = 0x50;
46 wme->oui[2] = 0xf2;
47 wme->oui_type = WME_OUI_TYPE;
48 wme->oui_subtype = WME_OUI_SUBTYPE_PARAMETER_ELEMENT;
49 wme->version = WME_VERSION;
50 wme->acInfo = hapd->parameter_set_count & 0xf;
52 /* fill in a parameter set record for each AC */
53 for (e = 0; e < 4; e++) {
54 struct wme_ac_parameter *ac = &wme->ac[e];
55 struct hostapd_wme_ac_params *acp =
56 &hapd->iconf->wme_ac_params[e];
58 ac->aifsn = acp->aifs;
59 ac->acm = acp->admission_control_mandatory;
60 ac->aci = e;
61 ac->reserved = 0;
62 ac->eCWmin = acp->cwmin;
63 ac->eCWmax = acp->cwmax;
64 ac->txopLimit = host_to_le16(acp->txopLimit);
67 pos = (u8 *) (wme + 1);
68 eid[1] = pos - eid - 2; /* element length */
70 return pos;
74 /* This function is called when a station sends an association request with
75 * WME info element. The function returns zero on success or non-zero on any
76 * error in WME element. eid does not include Element ID and Length octets. */
77 int hostapd_eid_wme_valid(struct hostapd_data *hapd, u8 *eid, size_t len)
79 struct wme_information_element *wme;
81 wpa_hexdump(MSG_MSGDUMP, "WME IE", eid, len);
83 if (len < sizeof(struct wme_information_element)) {
84 wpa_printf(MSG_DEBUG, "Too short WME IE (len=%lu)",
85 (unsigned long) len);
86 return -1;
89 wme = (struct wme_information_element *) eid;
90 wpa_printf(MSG_DEBUG, "Validating WME IE: OUI %02x:%02x:%02x "
91 "OUI type %d OUI sub-type %d version %d",
92 wme->oui[0], wme->oui[1], wme->oui[2], wme->oui_type,
93 wme->oui_subtype, wme->version);
94 if (os_memcmp(wme->oui, wme_oui, sizeof(wme_oui)) != 0 ||
95 wme->oui_type != WME_OUI_TYPE ||
96 wme->oui_subtype != WME_OUI_SUBTYPE_INFORMATION_ELEMENT ||
97 wme->version != WME_VERSION) {
98 wpa_printf(MSG_DEBUG, "Unsupported WME IE OUI/Type/Subtype/"
99 "Version");
100 return -1;
103 return 0;
107 /* This function is called when a station sends an ACK frame for an AssocResp
108 * frame (status=success) and the matching AssocReq contained a WME element.
110 int hostapd_wme_sta_config(struct hostapd_data *hapd, struct sta_info *sta)
112 /* update kernel STA data for WME related items (WLAN_STA_WPA flag) */
113 if (sta->flags & WLAN_STA_WME)
114 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
115 WLAN_STA_WME, ~0);
116 else
117 hostapd_sta_set_flags(hapd, sta->addr, sta->flags,
118 0, ~WLAN_STA_WME);
120 return 0;
124 static void wme_send_action(struct hostapd_data *hapd, const u8 *addr,
125 const struct wme_tspec_info_element *tspec,
126 u8 action_code, u8 dialogue_token, u8 status_code)
128 u8 buf[256];
129 struct ieee80211_mgmt *m = (struct ieee80211_mgmt *) buf;
130 struct wme_tspec_info_element *t =
131 (struct wme_tspec_info_element *)
132 m->u.action.u.wme_action.variable;
133 int len;
135 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
136 HOSTAPD_LEVEL_DEBUG,
137 "action response - reason %d", status_code);
138 os_memset(buf, 0, sizeof(buf));
139 m->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
140 WLAN_FC_STYPE_ACTION);
141 os_memcpy(m->da, addr, ETH_ALEN);
142 os_memcpy(m->sa, hapd->own_addr, ETH_ALEN);
143 os_memcpy(m->bssid, hapd->own_addr, ETH_ALEN);
144 m->u.action.category = WME_ACTION_CATEGORY;
145 m->u.action.u.wme_action.action_code = action_code;
146 m->u.action.u.wme_action.dialog_token = dialogue_token;
147 m->u.action.u.wme_action.status_code = status_code;
148 os_memcpy(t, tspec, sizeof(struct wme_tspec_info_element));
149 len = ((u8 *) (t + 1)) - buf;
151 if (hostapd_send_mgmt_frame(hapd, m, len, 0) < 0)
152 perror("wme_send_action: send");
156 /* given frame data payload size in bytes, and data_rate in bits per second
157 * returns time to complete frame exchange */
158 /* FIX: should not use floating point types */
159 static double wme_frame_exchange_time(int bytes, int data_rate, int encryption,
160 int cts_protection)
162 /* TODO: account for MAC/PHY headers correctly */
163 /* TODO: account for encryption headers */
164 /* TODO: account for WDS headers */
165 /* TODO: account for CTS protection */
166 /* TODO: account for SIFS + ACK at minimum PHY rate */
167 return (bytes + 400) * 8.0 / data_rate;
171 static void wme_setup_request(struct hostapd_data *hapd,
172 struct ieee80211_mgmt *mgmt,
173 struct wme_tspec_info_element *tspec, size_t len)
175 /* FIX: should not use floating point types */
176 double medium_time, pps;
178 /* TODO: account for airtime and answer no to tspec setup requests
179 * when none left!! */
181 pps = (tspec->mean_data_rate / 8.0) / tspec->nominal_msdu_size;
182 medium_time = (tspec->surplus_bandwidth_allowance / 8) * pps *
183 wme_frame_exchange_time(tspec->nominal_msdu_size,
184 tspec->minimum_phy_rate, 0, 0);
185 tspec->medium_time = medium_time * 1000000.0 / 32.0;
187 wme_send_action(hapd, mgmt->sa, tspec, WME_ACTION_CODE_SETUP_RESPONSE,
188 mgmt->u.action.u.wme_action.dialog_token,
189 WME_SETUP_RESPONSE_STATUS_ADMISSION_ACCEPTED);
193 void hostapd_wme_action(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
194 size_t len)
196 int action_code;
197 int left = len - IEEE80211_HDRLEN - 4;
198 u8 *pos = ((u8 *) mgmt) + IEEE80211_HDRLEN + 4;
199 struct ieee802_11_elems elems;
200 struct sta_info *sta = ap_get_sta(hapd, mgmt->sa);
202 /* check that the request comes from a valid station */
203 if (!sta ||
204 (sta->flags & (WLAN_STA_ASSOC | WLAN_STA_WME)) !=
205 (WLAN_STA_ASSOC | WLAN_STA_WME)) {
206 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
207 HOSTAPD_LEVEL_DEBUG,
208 "wme action received is not from associated wme"
209 " station");
210 /* TODO: respond with action frame refused status code */
211 return;
214 /* extract the tspec info element */
215 if (ieee802_11_parse_elems(hapd, pos, left, &elems, 1) == ParseFailed)
217 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
218 HOSTAPD_LEVEL_DEBUG,
219 "hostapd_wme_action - could not parse wme "
220 "action");
221 /* TODO: respond with action frame invalid parameters status
222 * code */
223 return;
226 if (!elems.wme_tspec ||
227 elems.wme_tspec_len != (sizeof(struct wme_tspec_info_element) - 2))
229 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
230 HOSTAPD_LEVEL_DEBUG,
231 "hostapd_wme_action - missing or wrong length "
232 "tspec");
233 /* TODO: respond with action frame invalid parameters status
234 * code */
235 return;
238 /* TODO: check the request is for an AC with ACM set, if not, refuse
239 * request */
241 action_code = mgmt->u.action.u.wme_action.action_code;
242 switch (action_code) {
243 case WME_ACTION_CODE_SETUP_REQUEST:
244 wme_setup_request(hapd, mgmt, (struct wme_tspec_info_element *)
245 elems.wme_tspec, len);
246 return;
247 #if 0
248 /* TODO: needed for client implementation */
249 case WME_ACTION_CODE_SETUP_RESPONSE:
250 wme_setup_request(hapd, mgmt, len);
251 return;
252 /* TODO: handle station teardown requests */
253 case WME_ACTION_CODE_TEARDOWN:
254 wme_teardown(hapd, mgmt, len);
255 return;
256 #endif
259 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
260 HOSTAPD_LEVEL_DEBUG,
261 "hostapd_wme_action - unknown action code %d",
262 action_code);